Sanitary liquid dispenser



May 25, 1937. w. TAMMINGA .Er AL 2,081,651

SANITARY LIQUID DISPENSER Filed M'ay 9, 1935 4 Shets-Sheet l WILL/AM TAMMINGA OTTO/WNO B ONOMI ROBERT E COEEAD/Nl ATTORNEY May 25, 1937. v w. TAMM|NGA Er AL 2,081,651

SANITARY LIQUID DISPENSER Filed May 9, 1955 4 Sheets-Sheet v2 L` l EBEE-239 ATTORNEY May 25, 1937.

w. TAMMINGA ET AL SANITARY LIQUID DISPENSER Filed May 9, 1935 4 Sheets-Sheet 3 INVENTORS w/LL/AM TAMM/NGA OTToB/NO BoNoMl ROBERT E. COREADINI 'S M Yuki/Qu ATTORNEY May 2,5, 1937. w. TAMMlNGA Er Al. 2,081,651

` SANITARY LIQUID DISPENSER Filed May's'a, 1955 4 sheets-sheet 4 ATTORNEY 2,031,651 y SNHTARY LIQUID DISPENSER William Tamminga and Ottorlno Bonomi, New

York, and Robert E.

Corradini, Bronx, N. Y.;

said Tamminga and said Bonomi assignors to said Corradini Application May 9, 1935, Serial No. 20,578

Claims.

This invention relates to sanitary liquid dispensers and has particular relation to devices for dispensing milk and similar emulsion-like liquids, and this application discloses in part the subject matter disclosed by us in the application Serial No. 4,734 filed February'4, 1935.

It is among the objects of the invention to provide an improved sanitary liquid dispensing delvice ywhich maintains the liquid stored in a container at uniform consistency and which has simple and readily accessible parts that can be readily maintained in sanitary condition and will prevent contamination or deterioration of the dispensed liquid. A particular object of the invention is a sanitary milk dispensing device.

The foregoing and other objects of the invention Will be best understood from the following description of exemplications thereof, reference being had to the accompanying drawings wherein Fig. 1 is a diagrammatic view, with parts shown in section. illustrating a milk dispensing device exemplifying one embodiment of the invention;

Fig. la'is a diagram of a modified control 4circuit for the device of Fig. 1;

Fig. 2 is a sectional view drawn to size of the cut-oif valve of Fig. 1;v

Fig. 3 is a diagrammatic sectional view of an overflow valve for use in -connection withl thev device of Fig. 1;

Fig. 41s a diagrammatic View, with parts shown in section,- illustrating a milk dispensing device exemplifying another embodiment of the invention;

Figs. 5 and 6 are diagrammatic views showing the positions of the control valve of Fig. 4 in consecutive operating positions;

Fig. 7 is a sectional view illustrating aA milk dispensing device exemplifying another embodiment of the invention;

Fig. 8 is a horizontal sectional view of the device along line 8 8 of Fig. 7

Fig. 9 is a vertical sectional view of the device along line 9 9 of Fig. 7;

Fig. 10 is a plan view of the dispensing head with the dispensing valve shown in horizontal cross section; and

Fig. 11 is a diagrammatic view of the device of Fig. 7.

Although milk has long been known as a most essential food, little progress has been made in the past' in constructing a sanitary milk dispenser because milk is a good breeding substance for bacteria and is an emulsion from which the dispersed cream tends to separate. In order to be satisfactory a milk dispensing device must maintain the dispensed milk at uniform consisutency, and must protect the dispensed milk against contamination and deterioration.

The milk dispenser of the present invention overcomes these diiculties. In accordance with the invention, the parts of the milk dispensing device through which the milk flows are simple and easy to clean. Preferably, they are combined as a unit with the can in which the dispensed milk is dispensed. The dispensing device has simple and straight discharge ducts and all its parts are readily accessible for clean- 'ing and scrubbing. In o rder to dispense'the liquid, the dispensing device is withdrawn from the milk can while maintaining its milk discharge duct connected with the bottom portion. of the can. In the dispensing position the dispensing device is detachably supported on a dispensing stand by means of which motive powerV is applied to discharge the milk through a full: protected discharge duct and to maintain the milk in the can in a uniform condition by periodic agitation with highly puried air discharged into the stored milk through the milk discharge duct.

As shown in the exemplication of the inven tion of Fig. 1, inside a refrigerator casingl i0, which is maintained at the proper temperature suitable for conditioning the milk; is stored a milk can II of conventional construction having a neck I2 closed with a cover I3 which forms a relatively large compartment I4 which may be in turn enclosed by a second outer cover I5. The two covers may be of the usual construction and are preferably provided with sealing lugs I 6 which may be locked and sealed by means of a lock I'l as indicated in the drawings. The outer cover I5 is removed before inserting the can I I into the refrigerator I0 so as to expose the in- 'terior of the cover compartment I 4. The top wall of the refrigerator I 0 has a large 'opening 20 over which is mounted a base plate 2| of a hollow pedestal 22 open on the front side above the refrigerator opening 20, and carrying a supporting plate 23 overhanging the open space above the base plate.

To the underside of the supporting plate 23 is attached the dispensing plate 21 of a dispensing head 28 by means of a screw held by a bolt nut 30. The dispensing head 28 is provided with an inclined discharge duct 3| terminating in a discharge opening 32 on the underside of the dispensing plate 21 and an adjoining vertical discharge duct 33 slidably movable through a connecting bushing 31 of the inner cover i3 which and the portion of the base plate 2| underlying.A r

the dispensing plate 21 have suitable openings for permitting movement of the dispensing head 28 from the position in engagement with the supporting plate 23 'as shown in full lines, to the dotted line position 28 in the compartment i6 of the cover, while the discharge duct 33 slides downwardly through-the outer tube 39 into the interior of the milk can Il.

The dispensinghead 28 may be quickly de -1 tached from the supporting plate 23 by unscrewing the nut'bolt 38 and pushing the dispensing position 28', or moved heacl 28 to th'e dotted line i from the dotted linev position 28'l within the cover to its position in engagement with the supporting plate 23. The discharge duct 33 may be locked and sealed in its operating position by a packing,v

ring 96 and a threaded lock cap 91.

The underside of the dispensing plate 21 has an annular recessed face portion 5l covered by a sealing ring 52 of suitable material, such as rubber, forming on the underside a seat for the vessels that are to be filled with milk. Under' normal operatingl conditions the open space on the front side of the pedestal is covered by a removable cover 68 enclosing the interior of the refrigerator and the adjoining hollow space of the pedestal 22.

On the portion of the pedestal cover underlying the sealing ring 52 is mounted a vessel holder 55 which is'carried by a tube 56 that is pressed upwardly by a helicalspring 51 held in place by an enclosure 58. A receiving vessel, such vas a glass 59, which is to be iilled with milk is placed on the holder 55 which presses the'upper edge of the vessel into sealing engagement with the sealing ring ,52, the vertical movement of the holder 55 making it possible to dispense milk into receiving vessels of different lengths.

In the central portion of the dispensing plate 21 is provided a suction aperture 6| in which may be mounted a cut-oi valve 62 shown in detail in Fig. 2. The cut-'oil valve is shawn in the form "of a tubular casing having an overlapping flange drop of liquid drawn up by suction acting through air inlet tube 66. To an opening 61 on the supporting plata 23 above the suction aperture 6| is connected an air pipe 69, leading to an opening 18 of a control valve 1|, by means of which theair'p'ipe l69 may be connected either to the suction opening 12 or the compression opening 13 of a rotary air pump 14 driven in the Idirection indicated by the arrow by yan electric motor 16.

The control valve 1| may be made in the form of a small tubular casing with an exhaust opening 80 and suction openings 8I,82 which'are controlled by a valve slide 83 provided with control pistons a4 Whinmay be moved I rcm the full line' aosaosi position as. shown in the drawings to the upward dotted line position 89 by pressing its actuating rod 81 with the button 88 against the action of the 'spring 66 which holds the valve slide 83 in its lower normal position.

In the connection between the suction inlet 8l of the controlvalve 1| and the suction inlet 12 of the pump 19 is included an air filter 96 for cleaning all the air entering into the suction pump 1Q so that only air free from dust passes through Ithe pump. A similar air filter 98' may be included in the air pipe 69 leading from control valve 1| for subjecting all the air entering into the dispenser to a second ltering operation. The air lter 98, like the lter '98', consists of a compartment enclosing a plurality of layers of lter texture 9i held in place by a perforated sheet 92 and a conical air guide 93 secured to a detachable cover 96 of the compartment. Air entering l from the valve opening 8| into the ltering corn-y partment 98 is distributed by the guide 93 and flows by way of the perforations ofthe sheet 92 through the layers of the .lter texture 9|-intothe inlet of the suction pump 16.

, To the actuating rod 81 of the control valve is connected, as by means of a swivel joint, the

'actuating lever 96 of a toggle switch 91 for,

controlling the energization of the electric motor 16 from the two supply line conductors 98, 99 connected to a conventional domestic electriccurrent supply plug |99. When the switch lever 96 is` in its downward position as shown in the drawings, the motor circuit is open and the motor'y does not operate. When the button of control rod 81 is pushed upwardly against the action of the spring 86, the switch lever 96 moves with the rod and closes the circuit, energizing the motor 16 and causing it to operate the pump while the valve slider 83 and the two valve pistons are in the dotted line position 89. As soon as the slider cally closed by any suitable device, for instance.'

by a cam Hilly driven through a. speed reduction gearing |05 withv a small constant speed motor |06 that is continuously energizedfrom the'two supply line conductors 98, 99, or any other clocklike device. In the preferred arrangement of the invention, the periodical closureof the contacts |83 is controlled .to complete the motor circuitabout once every 5 or 6 minutes and maintain the motor` in energized condition for about` 10 seconds every 5 or 6 minutes, causing the air pump 19 to operate for about 10 seconds every 5 or 6 minutes.

. The slider sa of the control valve u with' the motor control switch 91, may be actuatedeither manually by pressing against the button 88 of the actuating'rod 81, or by an electro-magnetic valverelay H9 which has an actuating coil l l l7 that may be energized from the line conductors 98, 99 by a dispensing relay H2 having normally open contacts. The dispensing relay H2 is actuated to close its contacts upon energization of its actuating coil |I3 overthe normally closed contacts of a lock-out relay ||4 and the normally open` contactsl of the Adispensing switch IIB through the low voltage end of a potentiometer I II, the ends of which are connected to the two electri'c supply line conductors 98, 99. Once the dispensing switch ||6 is closed, an energizing circuit is established through the actuating coil ||3 of the dispensing relay I I2 closing the energizing circuit ofthe actuating coil of the valve relay i I and instantaneously moving the slider 83 with its control piston 84 to the upper dotted line position 84'. On releasing and opening the dispensing switch IIB the actuating'coil of the valve relay ||0 is deenergized and the valve slider 83 is instantaneously returned by the action of the's'pring 86 to its normal downward position.

While the dispensing switch IIB is closed, the energizing circuit of the dispensing relay winding ||3 will be independently de-energized vby a lockout circuit formed of the conductors ||8 energized by thel potentiometer Il'l and leading by way of the actuating winding ||9 of the lockout relay H0 'to two immersion electrodes |20 mounted in an electrode insert |2| of insulating material, such as synthetic resin, which ts into a hole in the dispensing plate 21. The two conductors I I8 leading to the immersion electrodes I 20 may form a cord terminating into a detachable plug |23 tting into a suitable socket opening in the supporting plate 23 of the pedestal and having resiliently pressing contacts for establishing circuit connections to the electrodes |20. A gasket |25, of suitable packing material, such as rubber, interposed between the facing surfaces of the dispensing head 21 and the supporting plate 23 prevents-air leakage between the junction surfaces.

The lower ends of the two immersion electrodes |20 project to a level somewhat below the downvard level of the nozzle 63 of the cut-off valve 82 so that milk discharged into the glass 58 reaches the levelof the two electrodes |20 and establishes an 'electrically conducting connection therebetween before it reaches the lower' endof the cut-off valve 62.

'Ihe pump with its driving motor, control valve and associated elements are mounted in a casing |29 provided on the top of the refrigerator box I0. 'I'he several parts are preferably so mounted in the' casing |29 that an actuating'button IIE' provided on the valve relay for mechanically actuating the slider of the ucontrol valve 'II as well as the actuating member of the dispensing switch IIB are accessible from the exterior of the casing |29, as indicated in Fig. 1.

The. parts mounted on the top of the sup porting plate 23 are enclosed by a cover |38-held in place by means of the screw bolt 30 with which the 'dispensing head is attached to the supporting plate, and the pipe as well as the conductors interconnecting the dispensing head and vthe control mechanism are suitably mounted within the enclosures.

Under normal operating conditionsl the several parts are arranged in the way shown in Fig. 1. in the refrigerator i0 and is maintained at the proper temperature. 'Ihe circuit of the motor 15 is open at the time-controlled contacts ||5 and at the valve-controlled toggle switch 91.

If no dispensing operation is initiated, the continuously energized `motor |06 will periodically complete one rotation of the cam |04 at theend The can with'the milk is enclosed of a predetermined time setting, for instance, after each or 6 minutes, and close the contacts |03 for about 10 to 15 seconds. This causes periodical energization of the motor for about 10 seconds every 5 or 6 minutes causing the pump 14 to draw in air by way of the openings 85, 8I-

of the control valve, the air filter 90 and the pump inlet 72, and discharge compressed air through the pump outlet 'I3 over openings 82, I0 of the control valve 'I|, through the air pipe 69, the passages of cut-off valve 62, into the space enclosed by the 4glass 59, and therefrom by way of milk discharge ducts 3| and 33 to the bottom of the milk can stirring up the milk and agitating it as the released ais bubbles through the milk, maintaining the milk in an emulsified state and of uniform consistency.

, Tests have shown that by discharging compressed air every 5 or 6 minutes for periods of about 10 seconds into the space near the bottom of a can holding milk, the milk through: out the entire can will remain of uniform consistency. Tests have also shown that the condition o f the milk will not in any way be affected by the discharge of compressed air from the pump into the milk if the air discharged into the milk is passed through a lter which frees the air from dust.

Filtration of all the air discharged into the milk is secured by the lter 90 placed in front of the suction inlet of the pump. In a dispensingl device ofthe 'type described herein used in connection with a milk can about 2 feet high and holding about 10 gallons of milk and an air pump adjusted to produce a suction pressure corresponding to several inches of mercury suflicient to lift the milk into the discharge vessel, the air pump may be arranged to deliver the agitating air at an average rate of about V2 cubic foot per minute. The lter 90 used in connection with the device described above contains several layers of iiuiy 'cotton texture forming a filterv body about l/2 inch high,lthe filter layers consisting of standard commercially available filtering textures for air cleaning purposes.

Milk subjected to periodic agitation by air passed through a lter described above retains its highly -sanitary condition in which it is originally placed in the can. A second similar filter 90- may be connected in the air pipe 69 leading to the dispenser immediately in front riodically delivered by the pump 'I4 to the milkA discharge ducts 3| and 33 leading into-the bottom of the milk canin the way described above.

Milk may be dispensed at any time into the standby vessel 51 or any other vessel on seat 55 and held by the seat against the sealing ring 52 ir.- fheway shown in Fig. 1. c To discharge milk from the can into the vessel 51, the dispensing switch is closed, energizing Athe winding ||3 of the actuating relay causing in turn instantaneous encrgization of theactuating winding l of the valve relay I0 which actuates the valve slider 83 and moves the slider pistons into the dotted line positions 84'. In this lio positionthe control valve providesa" suction passagefrom the suction inlet l2 of the pump by way of the illter 9|), valve openings 6|, i3, air pipe 69, the cut-off valve 62, and by way of the vessel 59 to the space of the milk discharge ducts 3|, 33 leading to the bottom'of the milk can, and an exhaust passage from the` exhaust opening 'i3 of the pump through valve openings`62, 60 to the atmosphere. Thesuction'of the pump acting on Athe milk discharge ducts 3| and 33 exercises a suction force' lifting the milk from the can into the discharge duct 3| and produces an instantaneous now of milk'through the discharge opening 32 into the vessel 63. The flow oi milk may be instantaneously stopped when the milk in the'vessel 59 reaches the desired level as seen by the operator through the glass vesselv 56 by releasing the actuating switch H6. This brings about instantaneous return of the valve slider 163 to its downward position, cutting ofi the suction,

started, while the dispensing switch H6 is heldY closed if the milk reaches the level of the lower ends of the'immersion electrodes |26, thereby completing the energizing circuit for the actuating winding H3 of 'the lock-out relay H6 in the energizing circuit of the dispensing relay 3.

This causes instantaneous `opening of the contacts of relay H2 deenergizing the circuit of the valve relay ||0 and brings about instantaneous lreturn of `the valve slider 33 to the downward position and instantaneously stopping the flow of milk, as described above.

Milk may also be dispensed-intoa vessel held im onthe seat 55 in the way shown lin Fig. 1, by

direct manual actuation of the-valve slider by pressing the button 86 of the slider actuating rod 81er the button ||0 of the valve relay 00. This brings the control pistons 83 of the slider valve 83 to the upper dotted line positions 64', hereby connecting the suction end oi the pump with the milk discharge ducts 3|, 33 of the dispenser head. Like in the operation'described-above, the

suction of the pump produces a suction force o liftingl the milk through the milk ducts 39, 33,

into the discharge duct 3|, and causes the milk to ilow through the discharge opening 32 into the vessel 59. The flow of milk may be stopped at any instant when the milk in the vessel has reached the desired level as seen through the glass walls thereof by releasing the push button 68 of the control valves 1| which instantaneously stops the ow of the liquid and stops the motor 16 las described above.

The flow of the liquid under the action of the suction pump will also automatically b e cut oi while the push button 68 of the slider valve holds the control pistons 64 of the slider valve 33 in the upper positions 6l" if` the milk flowing into the vessel reaches the level of the ower end of the nozzle duct 63 of the cut-oft valve 62 shown exercised on the space above the ball valve and yheld in place, cutting o the suction from the space below the ball and stopping the further iiow of the milk into the vessel. The lled vessel suction from the air pipe 69.and releases the ball valve 66 which return's to its lower seat, and any small quantity. of milk that has gotten into the space above the nozzle/duct will flow down into the vessel placed onthe seat below it.`

The dispenser shown vin Fig. 1 with the electrical control circuit, including the dispensing switch H6, may be operated without the cut-ofi 'valve 62. In such arrangement entrance of milk into the air pipe SS-may be prevented by connecting between the air tube 69 and its connection to the opening 6| in the supporting plate 23 a cut-ofi oat valve shown in Fig. 3 comprising an overiiowchamber |30 connected through an overow tube |3| to the opening 61- of the supporting plate 23, the overflow chamber being connected to a float chamber |33 having an opening |39 `to which is connected the air pipe 69. AThe iioat chamber |33 is provided with a float |36 which normally rests on thesbottom of the chamber permitting in this normal position unobstructed ow of air between the dispenser passages and the ail; tube 69.v The iioat |34 is positioned to cause milk entering through the tube |3| into the float chamber |36 to lift L,the iloat and seal up the opening |39 leading to the air vpipe 69, thereby preventing milk from entering into the-air-pipe and'also cutting oi the suction from they dispenser passages. If, through some inadvertence, the,milk ilow is not stopped and continues to rise so that it reaches the overow chamber |30, the iioat |34 will be lifted and close the opening |39 leading to the air tube, thereby stopping the suction and preventing the further ilow of milk.- Damage to thev dispensing device and its parts is thus prevented and any accidental trouble may be readily removed without impairing the operativeness of the device...k

Each dispensing operation of the -device shown in Fig. 1 may be combined with a pre-agitation operation by controlling valve 1| and pump motor |08 in the way shown in Fig. 1a. Winding of thevalve relay is energized by an instantaneously opening relay which closes its contacts |6| after a predetermined delay upon energization of its yactuating winding |62 by'normally open contacts |63fof an instantaneously acting master relay |64. which has a second set of normally open contacts for energizing the pump motor 16. The master relay |64 will instantaneously close its contact sets |63, |65 upon energization of its actuating coil |66 overclosed contacts of the lock-out relay ||4 and the open contacts of `the dispensing switch H6k connected to the potentiometer v||'| like in Fig. l. Closure of the dispensing switch H6 instantaneously acuates the master relay |64 to close its two contact sets |63, |65. 'I'he motor starts and the pump discharges compressed agitating air-into the milk, pre-agitating the milk for a short timeA untilthe time-delay relay |60 closes itscontacts |16| to energize the valve relay coil bringing the valve slider to the position in which the motor driven pumplifts the to the lrepeiving vessel.

In a .similar way compressed air will be discharged into the milk immediately after the end milk from the can energizing circuit an auxiliary relay |10, like relay |60, which instantaneously closes the motor circuit upon closure of the master relay contacts |65, and has a predetermined time delay in opening the motor circuit upon opening of the master relay contacts |65 causing the pump to discharge compressed air through the milk passages for a predetermined short time without depending on thedriving energy of the momentum of the rotating masses of the motor and pump for such action.

, In the milk dispensing device described above, all milk ducts are simple, straight and easy to clean. The parts with which the milk may come into contact are a part of the milk can and are 'returned with the milk can for cleaning in the same way as the milk can is cleaned. All parts of the milk dispensing device which'may aifect the condition of the milk are thus readily accessible assuring maintenance of all the surfacesl that come in contact with the milk in a highly sanitary condition. The dispensing device is operated by gaseous pressure means in the form of.

an air pump which may serve to compress air as Well as to produce a partial vacuum or suck air. The air pump is driven by an electric motorwhich is operated by control means, including a valve unit and other accessories, for vperiodically discharging compressed air through the milk discharge ducts of the dispensing head into the milk for maintaining the milk at uniform consistency, and make sure that milk of the same consistency is dispensed from the can irrespective of its level in the can. Deterioration of the milk and its sanitary condition is secured by providing at the suction inlet of the air pump an air lter for freeing the air used in agitating the milk from impurities and accidental contamination that might aiect it.

The air pressure and control means eiect controlled dispensing of milk from the can into a vessel by applying motive power supplied by the air pressure means for lifting the milk through the protected milk discharge duct from the interior of the can into the readily removable vessel. The control means operate to stop the ow of milk at any desired level 'or at a predetermined stage of the ow, by mechanical as well as electrical iiow cut-oi means. The various elements of the device are safe-guarded against accidental faults, and prevent overflow of the milk from the can in case an element becomes defective. All the parts of the device are readily accessible and are easy to assemble and operate.

In Fig. 4 is shown an exemplication of a milk dispensing device embodying another form of the invention. It comprises a refrigerator 2|0, a

milk can 2| a milk dispensing head 228 with z. milk dispensing plate 221 and milk discharge ducts 23|, 233 constructed, arranged and cooperating like' the corresponding parts of the device of Fig. 1. In a similar way theopening on the top of the refrigerator 2|!! is enclosedby a base plate22| of a hollow pedestal 222 carrying a supporting plate 223. To the underside of theY supporting plate 223 is attached the dispensing plate 221 of the dispensing head 228 by a, screw bolt 236, which also holds in place the cover 235 enclosing thev space on the top of the supporting plate, a sealinggasket 236' being interposed at the junction surface. The hollow front space of the pedestal 222 is enclosed by a removable cover.. 248 which carries a vessel holder 255 by end a lter compartment 262 holding lter texture like that used in the filters 90 of Fig. 1.

` To an opening 261 on the supporting plate 223 above the air passage 26| lof the dispensing plate is connected the end of an air pipe 209 leading to a control unit 210 by means of which interconnections are established to a suction cylinder 21|, as well as the suction inlet 212 and the suction outlet 213 of a rotary air pump 214 driven by an electric motor 216 in the direction indicated by the arrow.

The control unit has a dispensing slider valve 280 and a pre-agitation slider valve 28| movable in valve casings 282, 283, respectively, the valve sliders being normally held in outward position as shown in Fig. 4 by helical springs 284 like the valve slider 83 of Fig. 1. A bell crank lever 285 having an actuating arm projecting from the pedestal compartment to be accessible to the operator, and held in the position shown in Fig. 4 by a spring 286, serves to push by means of an arm 288 the two valve sliders 26D, 28| to the position shown in Fig. 5 where they are caught by pawls 290,'29l that are actuated through link mounted on thev end walls 296, 291 of a suction cylinder 21| -that is attached to the supporting plate 223. 'I'he arms 294 and 295 are held in place by springs 299A and may be actuated'bsr the tappet rods 300 and 30| to unlatch through link rods 292, 293 the valve sliders 280 and 28|, respectively, to permit the valve sliders 288, 28| to return from the position in which they are shown in Fig. 5 to positions shown in Fig. 6 and Fig. 4.

Inside the vsuction cylinder 21| is mounted a movable piston 305 provided with a sealing ring 306 of flexible material, such as leather. Under the action of air pressure the piston may be moved in the upward direction to actuate the upper tappet rod 30| and unlatch the valve slider 28| bringing the two valves from the position and its compression opening 213 connected by' air pipes 3|0 and 3H to openings in the valve casing 282. The other valve casing 283 is connected through an air pipe 3|2 to the downward space of the suction cylinder 21|. A branch pipe 3|3l connects the upper space of the suction cylinder 21| to the air pipe 269 leading from the valve casing 282 to the dispenser head.

Valve casing 282 has an inlet opening 3|5 and valve casing 283 has two inlet. openings 3|6, 3|1, the two casings being interconnected by passages 3|8 and 3|9. The valve slider 280 is provided with a'fork member 33| engaging an actuating lever 332 of a toggle switch 333 for controlling the energization of the electric motor 216 from the two supply line conductors 334, 335 connected to a conventional domestic electric supply plug 336. When the valve slider is in the outward position shown in Fig. 4, the switch is open and the motor is de-energized. When the slider is in the inward position shown in Figs. 5 and 6, the toggle switch 333 is closed causing the motor turns to its outward position under the action of itshelical spring 284, the toggle switch 333 deenergizes the motor 216 and the momentum of the rotating masses of therotor and pump continue for a short time to drive the pump as in the arrangement of Fig. l. The motor is also pro-y vided withda pair of contacts 338 which are. periodically closed every or 6 minutes for about seconds to operate the pump 216 .for about 10 seconds every 5 or 6 minutes like in the device of Fig. 1.

`To establish interconnections between the various passages and openings, the valve slider 286 is provided with channels 325, 326 and the valve slider 261 is provided with channels 321, 328 and 329 providing bridging passages between the variousopenings and the pipe connected to the valve casings 282, 263.

Under normal operating conditions the several parts are arranged in,the way shown in Fig. e and the circuit of "the pump motor 216 is lopen at the contacts of the toggle switch 333 and at the periodically actuated contacts 333. The contacts 338 are periodically closed after each 5 or 6 minutes and maintained closed for about l0 tor' 15 seconds. This causes periodical energization of the motor 216 and periodical operation vof the pump ,216. for about 10 seconds every 5 or 6 minutes.` Each time theI pump operates it draws in air by way of inlet opening 315 of valve l ceived clean air and discharges it under pressure' through pump outlet 213, air pipe 311, valve slide channel 326, air pipe 269, through the supporting plate opening 261, lter compartment 262, passage 261, throughfthe sealed space withinthe standby vessel 259, by way o f the milk discharge tained at uniform consistency.

To dispense milk from the can into a vessel 259 pla'ced on the vessel holder 255 and held in engagement with the sealing ring 252, the actuatl ing button 286 of the valve leverl 265 is pressed `down bringing the two valve sliders 286, 261 from the position in Fig. l to the position in Fig. 5 where they are locked by the pawls 296, 261. The instant the two valve sliders are brought to the inward position shown in Fig. 5, the toggle switch 333 energizes the pump 4motor 216, setting into `operation the air pump 216. Air is sucked into the pump inlet 212 by way of inlet 316 of valve casing V281 through valve passages 321, 316, 325, air p ipe 316 and air iilter 215, the air being compressed and discharged by way of pump outlet 213 through pipe 311, valve passages 326, 313, 328, air pipe 312, into the bottom end of air cylinder 21|, driving the piston 366 in upward direction to compress and discharge the air from the space above the piston through the portion of air pipe 269 over dispenser head passage 26|, the

-space of the vessel 259 into the milk discharge milk and agitating it in advance of each dispensing action.

The level of the' milk in the tube 239 is thus at the lower end of the tube 238, which is the starting point for the low of the'milk in the immedi- 1 2,081,631' to operate. As soon as the valve slider 286 re= ately following dispensing action which is brought about at the moment when the upward movement of the piston 365 reaches a point where it lifts the tappet rod 36| from its normal position, tripping through link 293 the pawl arm 291 and releasing the valve slider 281 from its inward position,

establishing theslider positions shown in Fig. 6. In the new valve position, the pump 216 sucks air into the pump inlet 212 from the space in cylinder 2114 on the bottom ofA the piston 365 through v' pipe 312, valve passages 326, 318, 325, air pipe 316',

Aair pipe `266 is now closed by the valve slider 266,'

and thepiston 365 in the air cylinder 211 is pulled pump, the space of the cylinder 211 above the piston exercises through air pipe 266, dispensing plate passage 261, and the space of the vessel 259, a suction force lifting the milk from the starting 'point at the bottom end of tube 236 into the discharge ducts 233, 231 and discharging the milk'intc the vessel 256. The iiow of milk from the can 211 into the vessel 256 continues until the piston 365 reachesv the tappet rod 366 and pushes it downward, releasing the valve slider 286 from the position in which it is shown in Fig. 6.

Thereupon, the slider 266 is instantaneously returned to its normal position shown in Fig. 4, reestablishing the normal air connections for periodical agitation, and opening at the switch 333' .the energizing circuit of the motor like in the-device of Fig. l. In this way any desired amount of milk may be withdrawn from the can 211 and discharged into the milk receiving vessel 256, the amount of milk discharged into the vessel` being determined by the travel of the piston 365 inthe suction cylinder 211. By varying the length of the tappet rods 366 and 361, the length of travel of the piston can be varied to discharge any de sired predetermined amount of milk into the ves sel. Thus by using tappet rods of different lengths, either a pint of milk or a quart of milk may be delivered to the receiving vessel during each dispensing action.

- in downward direction by the suction from the Another exempliflcation of a milk dispensing l The two milk discharge ducts 631 and 633 are ljoined by a simple cylindrical valvev DV rotatable '-.in a cylindrical valve casing 636 by an upwardly projecting key 635 and enclosed by a cap 636. As shown in Fig. 10, and diagrammatically in Fig. 1l, lthe valve DV has three channels DV2, DV3, DVi and' an air vent DV5 and may be rotated by a forked arm 331 engaging the key 535 to establish various connections described hereinafter.

Likein the device of Fig. 4, a pedestalA 622 mounted on the top of the refrigerator 6 1 6- carries a'supporting member 623 which holds the dispensing plate 621 by interlocking wedge-like ridges 646 and a screw 66,1. The open front space of the pedestal 622 is enclosed by a cover 6311 having a vessel holder 1145 for holding a vessel 6116 against a sealing ring Mlattachedvto the underside of the dispensing plate 421. f'

of which has Tan opening 452 into a suction passage 4530i thev dispensing plate 421. Inside the Asuction cylinder 45| is mounted a suction piston 455 provided with a sealing ring 456. The piston carries a tripping rod 451 having a tripping pin 458 and is held in the downward position rby a helical spring 459.

In a housing 460 on the rear of the supporting- .mounted an air pump 410 which is rotated inthe direction of the arrow by an electric motor 41| which is energized from two supply line conductors 413 connected to a yconventional domestic electric supply plug either by a dispensing switch 412 or a pair of periodically closed contacts 415 actuated by a clock-like mechanism 416, like the prior arrangements.'

compartment adjoining the control cylinder, as shown in Fig. 8.

The air pump 410, the dispensing valve DV, the control valve CV, the suction piston 45|, the control piston 46| and the milk discharge ducts 43|, 433 are interconnected by passages through the valve channels, tubes and pipes in the way shown diagrammatically in Fig. 11 andthe corresponding parts of Figs. 7 to 10. The milk duct 433 is connected by the valve passage DV2 of the control valve DV and the air passagePI through the dispensing plate to a lter compartment 486 provided in the top of the dispensing plate and holding a suitable air filtering texture. The filter compartment 486 is in turn connected through a passage P2 in the supporting member -423 to the compression valve CV which establishes by the channel CVI .communication with the passage P leading to the upper space in thesuction cylinder 45|.

The top of the suction cylinder 45| is provided with a vent 48| terminating into a vent valve V3 having an air assage V3I and outlet oening V32. 'I'he valve V3 is operated by a feed by an oii- I center spring either in the full line positionl or in the dotted line position shown in Fig. 9, and has. a projecting arm 484 that is engaged by the pin 458 of the piston rod 451 during its upward movement to instantaneously swing the valve V3 to the position in which passage 48| is open-to the atmosphere through the aligned valve passage V3I and valve outlet opening V32; and a projecting arm 485 that is engaged by rod pin 458 on its downward movement to swing the cam 483 to its downward position shown in Fig. 9 and in Fig. ll in which the vent pas:age 48| is closed.

The connecting passage between the filter compartment 488 in the dispensing plate and the Y control valve CV is connected through an air pipe CP to the compression end of the air pump 410 for admitting compressed air delivered by the pump 419 through air pipe CP, passage P2, filter compartment 48B, passage PI, control valve channel DV2 into the milk duct 433, and therethrough to the bottom of the milk can for agitatlng the milk in the can and maintaining the milk at uni- 'I'his clock-like mechanism 416 may be housed in the cylindrical pedestal milk in the can 2|| and agltatlng it as in the form consistency. When the control valve CV is rotated by its arm 469 in clockwise direction, it is brought to a position where its valve channel CVI interconnects the passage P3 connected to the air space in the control cylinder 46 I, with the passage P5 leading to the air space on the to of the suction cylinder 45|.

In a similar way the valve DV when rotated by its arm 431 in counterclockwise direction establishes through its passage DV3 a connection between the discharge ducts 43|, 433 and permits flow of milk from thebottom of the milk can through tube 439 and discharge ducts 433 and 43| in to the vessel 446 if a suction force acts on 'the space within the vessel 446 through the suction opening 453 ofthe dispensing plate 421. At the same time the channel DV4 of the dispensing valve DV connects in its new position the'dispensing head passage PI leading from'the compressor to the vent DV5 of the casing permitting the air from the compressor to be discharged through the atmosphere while suction is applied 4 to the milk discharge ducts 43|, 433 connected by the valve channel DV3.

The passage P3 leading to thecontrol cylinder 46| is connected through air pipe SP and air filter 488 to the suction inlet of the air pump 410,

\ causing the suction force applied by the air pump tol pull the control piston 462 from its inward position in which it is held by the spring 466 to its forward position, and to rotate by the engagement of the piston rod 464 with the valve arms 431, 418, to rotate the valves DV and CV by an angle required to change the various con nections established by the. two valves from the agitation position to the dispensing position. A vent passage to the atmosphere, for instance, passage P4 through the rod 464, prevents creation of suction in the space of the control cylinder 46| opposite the spring during its forward movement.

The suction force exercised by the pump 410 is controlled by a 'normally open vent passage 49| leading from the forward side of the control cylinder 46| to the atmosphere, a-plunger 492 operated by a rod 493 serving to close the vent opening 49| when brought to the upper dotted line position 492' by means of a bell crank lever 494 actuated by a push rod 495 having an actuating button 496 which is pressed inwardly when the receiving vessel 446 is placed on the holder 445 for receiving milk. 'The upward movement of the actuating rod 493 also controls the mercury switch 412 lifting it up to a position in which it closes the energizing circuit to the motor 41| if the lever 494 is swung upwardly by pressing against the dispensing button 496 of the device.

Under normal operating conditions the several parts are arranged in the way shown in Fig. 1l,

Each time the pump operates it draws ln air by way of the opening leading from the atmosphere through the open vent passage 49| into .the control cylinder 46| and therefrom through passage P3, suction pipe SP, air filter 488 into the suction discharging it under pressure through the compression pipe CP, passage P2, filter compartment side of the air pump 410, compressing the air and into the bottom 24|) of the can, stirring up the Y prior embodiments of the invention. This agitation is periodically repeated to maintain at al times uniform consistency of the milk.

To dispense the milk from the can into the vessel M6, the vessel is placed on the holder M and brought into engagement with the sealing ring of the dispensing plate 421. In placing the vessel on the holder, the push button @96 is pressed inwardly against the pedestal rotatingl the lever 59d and lifting the rod Q93 which closes by meansV of the switch S72 the circuit of the pump motor all and by plunger 692 the air inlet dei intoY the control cylinder tti. Suction of the pump M0 now acting through the suction pipe SP'and the branch of the passage P3 leading to the space i pulls the control piston $62 from its inward'position against the action of the spring'lGG and causes the piston rod 66d to rotate the two valve arms titlV and lit@ till the two valves DV and CV are rotated to the position where milk discharge duct Mi is connected over` valve channel DVS to the suction duct 633 and the suction pipe SP of the pump is con- 533. and 239, liftingvv the milk into the discharge duct @3l and discharging it into the vessel M6.

.'I'he flow of milk from the can 2li into the vessel M6 continues until the suction piston Q55 reaches a position in which its tripping rod 657 trips the vent valve V3-and opens the space on nthe upper .side ofthe suction piston '355 to the atmosphere releasing the suction. This stops instantaneouslythe milk flow, and the milk ves" holder 365.

sel M6 may be removed from its'seat on the The amount of milk dispensed by the IAdevice may be readily controlled by the length o f the movement of the suction piston @55 in the cylinder' 185i and this length may be adjusted to any predetermined value by varying the length of the tripping'u rod 455i of the piston @55 or by adjustably mounting vthe actuating pin @58 at diierent heights of the rod ftl.

The action of the .piston @55 in producing the suction force for lifting the'milk and returning to its vdownward position may be additionally controlled by means of a tiny bleeding duct 698 through'the piston.

The features of the invention are not limited to the details of construction referred to hereinabove in describing various exemplications thereof, but are applicable tol devices for dis-I pensing other liquids that will suggest themselves to those skilled in the art. The term emulsion-like liquid as used herein is intended to include liquids containing separable substances which tend to separate from the liquid and require substantial agitation ofthe liquid for maintaining consistency of the liquid, and it is accordingly desired thatthe appended claims be. given a broad construction commensurate yaccused ing for discharging liquid from said container through said opening, operating means including a gaseous energy source, and control means for applying energy fromsaid source to produce a discharge of liquid from said container through said discharge duct into said discharge opening or a discharge of gas through said discharge duct intosaid liquid, said gaseous energy sourcebeing proportioned Ato deliver gas of suf-- lciently large energy and said duct having sufilciently low ow resistance for producing with the gas discharged into said liquid an agitating motion requiredto distribute substantially uniformly within said liquid separable substances contained in said liquid.

.2. In a device for dispensing from a container a liquid lcontaining a separable substance uniformly suspended in said liquid, a dispensing member having" a discharge duct with a discharge opening for discharging liquid from said container, operating means including a gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of gas into said liquid and for discharging liquid fromsaid container through said discharge duct into said discharge opening,

i means for actuating said operating means to produce at periodic intervals a discharge of gas into said liquid, said gaseous energy source being proportioned to deliver gas of suicient energy and said gas passage having suiiciently low flow resistance for producing with the discharged gas an agitating motiony of the liquidrequired to distribute said separable substance substantially uniformly within said liquid and control means for actuating said operating means to produce a discharge of liquid from said container.

3. In a device for dispensing from a container a liquid containing a separable substance suspended uniformly in vsaid liquid, a dispensing member having a discharge duct extending from the lower level of said container with a discharge opening for discharging liquid from said container, operating means includinga gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of gas into said liquid and for discharging liquid from said container through said discharge duct into said discharge opening, and control means for actuating said operating means to produce a discharge of liquid from said container and a discharge of gas into the liquid of said container in predetermined relation vto the discharge' of liquid from said container', said gaseous energy source being proportioned to -deliver gas of sufcient energy and said gas passage having sumciently low ow resistance for producing with'the discharged gas an agitating -motion of the liquid required to distribute said separable substance substantially uniformly within said liquid. i

4. In a device for'dispensing from a container a liquid containing a separable substance uniformly suspended in said liquid, a dispensing member having a discharge duct with a discharge opening for discharging liquid from said container.. operating means including a gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of .gas into said liquid and for discharging liquid from said container through said discharge duct into said discharge opening, means for actuating said operating meansto produce at periodic intervals a discharge of gas into said liquid, and independent control means for actuating said operating means to produce a discharge of liquid from said container and a discharge of gas into the liquid of said container in predetermined relation to the dischargeof liquid from said container, said gaseous energy source being proportioned to deliver gas of suiiicient energy and said gas passage having suiciently low ow resistance for producing with the discharged gas an agitating motion of the liquid required to distribute saidy separable substance substantially uniformly within said liquid.

5. In a device-for dispensing an emulsion-like liquid from a container, a container for said liquid having removable enclosing means forming a compartment adjoining the liquid holding space thereof, a dispensing member having a straight downwardly directed discharge duct with a discharge opening for discharging liquid from said container through said opening, a straight downwardly directed supply duct joined to said discharge duct for delivering liquid-from a lower level in said container to said discharge duct, said ducts having an accessible junction portion for exposing the interior passages of said ducts, said dispensing member being shaped to permit movement thereof between a position inside said compartment to Van elevated position above said compartment for discharging liquid from said container, and coupling means detachably inter- 30 tting with said dispensing member for establishing operative connections between said operating means and said dispensing member in dispensing position.

6. In a device for dispensing an emulsion-like liquid from a, container, a container for said liq uid having removable enclosing means forming a compartment adjoining the liquid holding space thereof, a dispensing member having a straight downwardly directed discharge duct with a discharge opening for discharging liquid from said container through said opening, a straight downwardly directed supply duct joined to said discharge duct for delivering liquid from a lower level in said container to said discharge duct, said V ducts having an accessible junction portion for/1."l` exposing the interior passages ofsaid ducts, said dispensing member being shaped to permit movement thereof between a position inside'said compartment to an elevated positioncabove said compartment for discharging liquid. from said container, said supply duct being slidably mounted in said cover and having a tubular extension to the bottom portio'n oi said container, and coupling means detachably intertting with said dispensing member for establishing operative connections between said operating means and said dispensing member in dispensing position.

7. In a device fordlspensing from a container a liquid containing a separable substance suspended uniformly'in said liquid, a dispensing member having a discharge duct extending from the lower level of said container with a discharge opening for discharging liquid from said container, operating means including a gaseous energy source havinga gas udischarge passage for applying energy from said source to produce a discharge of gas into said liquid and for discharging liquid from said container through said discharge duct into said discharge opening, and control means for actuating said operating means to produce a discharge of liquid from said container and a discharge of gas into the liquid of said container in advance vof the discharge of liquid from said container, said gaseous energy i 75 source being proportioned to deliver gas of sumcient energy and said gas passage having suillciently low ow resistance for producing with the discharged gas an agitating motion of the liquid required to distribute said separable substance substantially uniformly within said liquid.

8. In a. device for dispensing an emulsion-like liquid from a container, a container for said liquid having removable enclosing means forming a compartment adjoining the liquid holding space thereof, a dispensing member having a discharge duct with a discharge opening, a supply duct joined to said discharge duct for delivering liquid from a lower level in said container to said dis- Y charge duct, operating means including a gaseous energy source, means for applying energy from said source to produce a discharge of liquid from said container through said discharge duct into said discharge opening or a discharge of gas through said discharge duct into said liquid, said dispensing member being shaped to permit movement thereof between a position inside said compartment to an elevated position above said compartment for discharging liquid from said containerz and coupling means detachably intertting with said dispensing member for establishing operative connections between said operating means and said dispensing member in dispensing position. v

9. In a device for dispensing an emulsion-like liquid from a container, a container for said liquid having removable enclosing means forming a compartment adjoining the liquid holding space thereof, a. dispensing member having a straight downwardly directed discharge duct with a discharge opening for discharging liquid from said container through said opening, a straight downwardly directed supply duct joined to said discharge duct for delivering liquid from a lower level in said container to said discharge duct, said ducts having an accessible junction portion for exposing the interior passages of said ducts, said dispensing member being shaped to permit movement thereof between a position inside said compartment to an elevated position above said compartment for discharging liquid from said container, operating means including a gaseous energy source, and means for appyling energy from said-osource to produce a discharge of gas through said discharge duct into said liquid or a discharge of liquid from said container through said discharge duct into said discharge opening, and coupling means detachably interiitting with said dispensing member for establishing operative connections between said operating means and said dispensing member in dispensing position.

l0. In a'device for dispensing an emulsion-like liquid from a container, a dispensing member having a discharge duct with a discharge opening for discharging liquid from said-container through said opening, operating means including a gaseous energy source, and means for applying energy from said source to produce a discharge of gas through said discharge duct into said liquid and a discharge of liquid from said container through said discharge duct into said discharge opening, means for actuating said operating means to produce a. discharge of liquid from said container into said discharge opening, and means for producing a discharge of gas into the liquid of said container in predetermined relation to the discharge of liquid from said container.

11. In a device for dispensing from a container a liquid containing a separable substanceuniformly suspended in said liquid, a dispensing the lower level of said container with a discharge opening for discharging liquid from said container, operating means including a gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of gas into said liquidand for discharging liquid from said container through said discharge duct into said discharge opening, and control means for actuating said operating means to produce a discharge of liquid from said container forming a compartment adjoining the liquid holdr ing space thereof, a. dispensing member having a discharge duct extending from the lower level of said container with a discharge opening for discharging liquid from` said container, said dispensing member being shaped to permit movement thereof between a position inside said compartment to an elevated position above said compartment for discharging liquid from said container, operating means including a. gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of gas into said liquid and for discharging liquid from said container through said discharge duct into said discharge opening, means for actuating said operating means to produce a discharge of gas into said liquid, said gaseous energy source being proportioned to deliver gas of suiiicient energy and said gas passage having suiiiciently low ow resistance for producing with the discharged gas an agitating motion of the liquid required to distribute said separable substance substantially uniformly within saidliquid, and control means for actuating said 1operating means to produce a discharge of liquid from said container.

13. In a device for dispensing from a container a liquid containing a separable substance suspended uniformly in said liquid, a container for said liquid having removable enclosing means forming a compartment adjoining the liquid holding space thereof, a dispensing member having a discharge duct extending from the lower level of said container with a discharge opening for discharging liquid from said container, said dispensing member being shaped to permit movement thereof between a position inside said compartment to an elevated position above said compartment for discharging liquid from said container, operating means including a gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of gas into said liquid and for discharging liquid from said container through said discharge duct into said discharge opening, means for actuating said operating means to produce at periodic intervals a discharge of gas into said liquid, and control means for actuating said operating means to produce a discharge of liquid from said container, said gaseous energy source being proportioned to deliver gas of sufficient energyand said gas passage having sumciently low dow resistance for producing with 'the discharged gas an agitating motion of the liquid required to distribute said separable substance substantially uniformly within said liquid.

14. In a device for dispensing an emulsion-like liquid from a container, a dispensing member having a discharge duct with a discharge opening for discharging liquid lfrom said container through said opening, operating means including a gaseous energy source, means for applying energy from said source to produce a discharge of gas through said discharge duct into said liquid and a discharge of liquid from said container through said discharge duct into said discharge opening, periodically actuated means for causing said operating means to produce at periodical intervals a ow of gas into said liquid to agitate said liquid, and means for independently actuating said operating means to produce a discharge of liquid from said container into said discharge opening.

15. In a device for dispensing an emulsion-like liquid from a container, a dispensing member having a discharge duct with a discharge opening for discharging liquid from said container through said opening, operating means including a gaseous energy source, means for applying energy from said source to produce a discharge of gas through said discharge duct into said liquid and a discharge of liquid from said container through said discharge duct into saidv discharge opening, means for actuating said operating means to produce a discharge of liquid from said container into said discharge opening, and cutoi means actuated at a predetermined stage of the discharge of the liquid from the discharge duct for stopping said ow of liquid.

16. In a device for dispensing from a container a liquid containing a separable substance suspended uniformly in said liquid, a dispensing member having a discharge duct extending from the lower level of said container with a discharge opening for discharging liquid from said container, operating means including a gaseous energy source having a gas discharge passage for applying energy from said source to produce a discharge of gas into said liquid and for discharging liquid from said container through said discharge duct into said discharge opening, control means for actuating said operating means to produce a discharge of liquid from said container, means for actuating said operating means to produce a discharge of gas into said liquid, said gaseous energy source being proportioned to deliver gas of sumcient venergy and said gas passage having sufficiently low ow resistance for producing with the discharged gas an agitating motion of the liquid required to distribute said separable substance substantially uniformly Within said liquid, and cut-oii means actuated at a predetermined stage oi the discharge ci' the liquid from the discharge duct for stopping said iiow of liquid.

1'?. In a device for dispensing an emulsion-like liquid from a container, a dispensing member having a discharge duct with a discharge opening for discharging liquid from said containerthrough said opening, operating means including a gaseous energy source, valve means movable between a position establishing an agitation passage for producing with energy from said source a discharge of gas through said discharge duct into said liquid and a position establishing a dispensing passage for producing with energy from said source a discharge of liquid through said dis- Ali charge duct into said opening, means for actuating said operating means to produce a discharge of liquid from said container into said discharge opening, and means for producing a discharge of gas into the liquid of said container in predetermined relation to the discharge of liquid from said container.

18. In a device for dispensing an emulsion-like liquid from a container, a dispensing member having a discharge duct with a discharge opening for discharging liquid from said container through said opening, operating means including a gaseous energy source, valve means movable between a position establishing an agitation passage for producing with energy from said source a discharge of gas through said discharge duct into said liquid and a position establishing a dispensing passage for producing with energy from said source a discharge of liquid through said discharge duct into said opening, periodically actuated means for causing said operating means to produce at periodical rintervals a flow of gas into said liquid to agitate said liquid, and means for independently actuating said operating means to produce a discharge of liquid from said container into said discharge opening.

19. In a device for dispensing an emulsionlike liquid from a container, a dispensing member having a discharge duct with a discharge open- -ing for discharging liquid from said container through said opening, operating means including a gaseous energy source, valve means movable between a position establishing an agitation passage for producing with energy from said source a discharge of gas through said discharge duct into liquid.

20. In a device for dispensing an emulsion-like liquid from a container, a dispensing member having a discharge duct with a discharge opening for discharging liquid from said container through said opening, operating means including a gaseous energy source, valve means movable between a position establishing an agitation passage for producing with energy from said source a discharge of gas through said discharge duct into said liquid and a position establishing a dispensing-passage for producing with energy from said source a discharge of liquid through said discharge duct into said opening, periodically actuated means for causing said operating means to produce at periodical intervals a ow of gas into said liquid to agitat-e said liquid, means for actuating said operating means to produce a discharge of liquid from said container into said discharge opening, and cut-off means actuated at a predetermined stage of the discharge of the liquid from the discharge duct for stopping said ow of liquid.

. WILLIAM TAMMINGA.

O'I'IORINO BONOMI. ROBERT E. CORRADINI. 

